Quick-detachable cap



C. D. WRIGHT.

QUICK DETACHABLE CAP.

APPLICATION FILED DEC. 14, 1920.

1,406, 1 33. Patented Feb. 7, 1922.

2 SHEETSSHEET I.

M mmvrog.

@ ATTORNEYS.

C. D.-WR|GHT.

QUICK DETACHABLE CAP.

APPLICATION FILED DEC. 14, 1920.

2 SHEETSSHEET 2- Iatented Feb. 7, 1922.

ASINVENTOR. z BY h A TTORNEYS.

UNITED STATES cmom. n. wme rr, or WEBSTER, NEW YORK.

PATENT OFFICE.

QUICK-DETAGHABLE CAI.

Specification of Letters Patent.

Patented Feb. '7, 1922.

Application filed December 14, 1920. Serial No. 430,677.

To all whom it may concern:

Be it known that I, CARROLL D.- WRIGHT, a citizen of the United States,and resident of Webster, in the county of Monroeand State of New York,have invented certain new and useful Improvements in Quick-Demoved fromthe threaded body and will ef-- fectively secure the cap to such body.

To these and other endsthe invention consists of certain parts andcombinations of parts, all of which will be hereinafter described, thenovel features being pointed out in the appended claims.

In the drawings:

Fig. 1 is a view of one embodiment of the cap partially in sectionattached to a tire valve stem, only a fragment of the latter beingshown;

Fig. 2 is a fragmentary view of the lower end of the cap;

Fig.- 3 is an end view of the open end of the cap;

Fig. 4 is a section on the line 4--4, Fig. 1 showing the cap before itis rotated into engagement with the threads;

Fig. 5 is a like section showing the cap after the same has been rotatedinto engagement with the threads;

Fig. 6 is a fragmentary view showing the manner in which the retainingdevices en-' gage with the threads;

Fig. '7 is a fragmentary view of another embodiment of the invention;

Fig. 8 is a horizontal section through the embodiment illustrated inFig. 7 showing the manner in which it engages the stem;

Fig. 9 is a detail view of the wire member from which the two retainingdevices of Fig. 7 are formed;

Fig. 10 shows in side elevation, another embodlment of the inventionattached to a valve stem;

Fig; 11 1s a view partially in section and elevation of the embodimentshown in 1g. 12 is a section on the line 1212,

Flg. 10;

Fig. 13 is a view partially in section and elevation of still anotherembodiment of 60 the invention;

Fig. 14 is a view in section and elevation of still another embodimentof the invention attached to a valve stem;

Fig. 15 is a section on the line 15-15, 65

Fig. 14;

16 is a view in elevation of the embodiment shown in Figs. 11 and 15;and

Flg. is a detail perspective view of the resilient means employed in theembodiment illustrated in Figs. 14 to 16 inclusive.

According to this invention, the cap has two ylelding or resilientdevices separated from each other so that such devices may have thescrew threaded portions of the stem or body to which the cap is to befitted, operate between them upon the fitting of the cap to such body,these resilient de- V1ces engaging'with the threads u on rotation of thecap on the body and y1elding to accommodate themselves to the threads.Preferably, these yielding devices yield in two directions, namely, inthe direction of the axis of the cap and also transversely of such axis,so that they may enter readily between the threads while at the sametime maintaining firm frictional engagement with the threads.

In theembodiment of the invention illustrated in Figs. 1 to 6 the capbody 18 has a mouth or open end of a diameter greater than the diameterof the threaded ortion of the stem or body to which the cap is to befitted. Opposite walls of the cap body 18 adjacent the mouth or open endare pro- 96 vided with slots 19 and in these slots two short pieces ofresilient material such as wires 20 are fitted, the ends of the wiresresting against or abutting the ends of the slots. A

ring 21 surrounds the cap body 18 100 Figs. 1 to 6.

about the slots and serves for holding the resilient. devices 20 inplace. The resllient devices 20 are spaced apart in the direction of thediameter of the cap such a distance that they may travel freely over theflattened faces 22 of the stem and they are also separated at their ends'such distances that the threaded portions 23 of the stem may operatebetween such ends as shown in Fig. 4. Upon the rotation of the cap bodytoward the position illustrated in Flg. 5, the resilient bars or devices20 will yield sd asto enter between threads on opposlte 'sides of thestem as shown in Fig. 6. This yielding takes place in two directions,namely, transversely of the axis of the ca body and also in thedirection of the axis of the cap body, due to the factthat the device onone side of the cap body will be out of the plane of the device on theother side of the cap body on account of the spiral arran ement' of thescrew threads.

In the em diment shown in Figs. 7 to 9, the two. resilient retainingdevices 20 are formed from one piece of wire bent into substantiallyring shaped formation and flattened at opposite sides to provide the re-.taining devices 20. This wire ring is split at 24 and is fitted withinan annular groove 25 formed in the cap body 18 A boss 26 is pressedinwardly'fromfthe cap body at the annular groove to project into thesplit of the ring for the purpose of preventing the turning of the ringin the cap body. The operation of this embodiment of the invention isthe same as that illustrated in In the embodiment shown in Figs. 10 to12 inclusive, the cap body 18 is flared at its mouth to provide a seat27 for a resilient ring 28. The retaining devices 20 are in the form ofresilient projections or tongues extending loosely through slots 29 inopposite sides of the cap body and formed on pieces of said metal 30which is soldered to the outer faces of the cap body. In this form ofthe invention, the tongues are resilient only in the direction of theaxis of the body. Otherwise, the operation is the same as that describedin Figs. 1 to 6.

In the embodiment shown in Fig. 13, the cap body 18 is formed like thatshown in Figs. 10 to 12 except that the retaining devices 20 are inpairs on opposite sides of the body and project through slots 29 frompieces of resilient sheet metal 30, the two retaining devices. beingformed at 0pposite ends of the sheet metal piece which is securedcentrally to the cap body by a rivet 31. This construction'permits theretaining device not only to yield in the direction of the axis of thecap body, but also to yield transversely of said axis.

In the embodiment shown in Figs. 15 to except that the retaining devices20 are in the form of extensions on a rubber body formed on oppositewalls of the cap body. The rubber'extensions 2O yield to accom modatethemselves to the threads in the man ner illustrated in Fig. 14.

In all embodiments of the invention, the cap is constructed to, fit overa valve stem or similar body provided with flattened sides and screwthreaded portions between said flattened sides. The cap in being fittedt0 the body is moved longitudinally of the fiattened sides until thedesired position of the cap is reached. Thereafter the cap is rotated onthe stem and the retaining devices yield ingly engage with the threads.In some instances, these yielding retaining devices move in thedirection of the axis of the cap and in other instances, they yield onlyin a direction transversely of the axis of the cap. In still otherinstances they yield in both of such directions.

The yielding in the direction of the axis of the cap permits the devicesto accommodate themselves to the screw. threads while the yielding inthe direction transversely of the axis produces a binding action on thescrew threads. It is desirable that the mouth "of the cap be brought inabutment with'the part at the base of the stem as this assists theretaining action of the; retaining devices and this action is furtherassisted when the mouth of the caphas a resilient means surrounding it.

What I claim as m invention and desire to secure by Letters atent is:

.1. A quick detachable cap comprising a cap body provided with a pair ofresilient devices on the interior and opposite walls thereof, separatedat their ends to permit the fitting of the cap body to a suitableanchoring body, and to yieldingly engage the threads of said anchoringbody on the rotation of the cap body after such fitting.

2. A quick detachable cap comprising a cap body provided with a pairofresillent devices on the interior and opposite walls thereof,separated at their ends to permit the fitting of the cap body to. asuitable anchoring body, and to yieldingly engage the threads of saidanchoring body on the r0- tation of the cap body after such fitting,said devices being yieldablein the direction of the axis of the cap.-

3. A quick detachable cap comprising-a cap body provided with a pair ofresilient devices on the interior and opposite walls thereof, separatedat their ends to permit the fitting of the cap body to a suitableanchoring body, and to yieldingl engage the threads of. said anchoringbo y on the '30 which is received within pockets 32 e rotation of thecap body after such fitting, anchoring body, and to yieldingly engagesaid devices being yieldable in a direction the threads of saidanchoring body on the 10 transversely of the cap. v rotation of the capbody after such fitting,

4. quick detachable cap comprising a said devices being yieldable in thedirection cap body provided with a pair of resilient of the axis of thecap and also yieldable devices on the interior and opposite walls in adirection transversely of the axis of thereof, separated at their endsto permit the cap. the fitting of the cap body to a suitable CARROLL D.WRIGHT.

